/*!
 * @license
 * Copyright 2019 Alfresco, Inc. and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import { Injectable } from '@angular/core';
import { ContentType } from './content-types';

type SerializerFn<T> = (x: T) => string;
type DeserializerFn<T> = (y: string) => T;
type SerializerRegistry<T> = {
    [ key in ContentType ]: {
        serialize: SerializerFn<T>;
        deserialize: DeserializerFn<T>;
    }
};

interface RegisterParams<T> {
    type: ContentType;
    serialize: SerializerFn<T>;
    deserialize: DeserializerFn<T>;
}

@Injectable({ providedIn: 'root' })
export class ModelContentSerializer<T = any> {
    private registry: SerializerRegistry<T>;

    constructor() {
        this.registry = {} as SerializerRegistry<T>;
    }

    register({ type, serialize, deserialize }: RegisterParams<T>) {
        this.registry[type] = { serialize, deserialize };
    }

    serialize(content: T, type: ContentType ): string {
        return this.registry[type].serialize.call(undefined, content);
    }

    deserialize(serializedContent: string, type: ContentType ): T {
        return this.registry[type].deserialize.call(undefined, serializedContent);
    }
}
